Table 8.1: Esp-View Utility Datascope Window Buttons - Avocent ESP Serial Hub Installer/User Manual

68 ESP Serial Hub Installer/User Guide
Datascope window
The Settings panel contains listboxes for selecting the serial hub port number and the maximum
number of the sample "buckets" in the buffer (see Sample buckets on page 69 for
more information).
The main panel contains 16 rows of data during operation or review - 8 receive data rows and 8
transmit data rows, arrayed in Rx/Tx pairs. Each row contains 16 characters of hexadecimal data
plus the equivalent ASCII characters. Nonprintable ASCII data is displayed as a period (.). Blanks
are written in fields where no valid data exists.
The right panel contains a graphical display of a DB-9 connector that indicates the state of the
control signals (red = low, green = high). The transmit and receive signals are always red. If control
signals change between samples, the colors will change at the start of the next sample display.
When samples are being collected, the area under the connector display contains a timestamp,
recorded in milliseconds at the beginning of each sample. During playback, timestamps are
displayed relative to the start time of the datascope session, not the time of day or date. The
accuracy of the timestamp is dependent on the Java Virtual Machine and the environment where
the datascope is being used.
The display advances in real time. Data from the next sample follows the last received data,
regardless of whether it was transmit or receive data.
Table 8.1 describes each of the buttons in the lower left panel (from left to right).

Table 8.1: ESP-View Utility Datascope Window Buttons

Button
Beginning (double left arrow with bar)
Reverse (double left arrow)
Play (right arrow)
Stop (square)
Pause (two bars)
Forward (double right arrow)
End (double right arrow with bar)
The counters in the lower right panel display the number of saved samples, the number of buffered
receive data bytes and the number of buffered transmit data bytes.
The lower right panel will also contain a rotating circle when samples are being collected.
Description
Goes to the beginning of the table (view mode)
Goes up 16 rows in the table (view mode)
Starts sample collection
Stops sample collection and closes the connection
Stops sample collection but maintains the connection, waiting for a
command to resume or stop
Goes forward 16 rows in the table (view mode)
Goes to the end of the table (view mode)